Interrupter for electromagnetic reciprocating devices.



A. LE BLANO. INTBRHUPTER FOR ELECTROMAGNETIC REGIPROGATING DEVICES.

APPLIGATION FILED SEPT.28,,1910. 1,124,470.

Patented Jan. 12, 1915.

W/ T/VESSES:

A TTOR/VE reciprocate rapidly, whereby the interrupter influence of the coil,

Fig.

ALEXIS LE BLANG, OF NEW YORK, N. Y.

INTERRUPTER FOR ELECTROMAGNETIC RECIPROCATING DEVICES.

1 specification of Letters Patent.

Patented Jan. 12, 1915.

Application filed September 28, 1910. Serial No. 584,175.

To all whom it may concern. 7

Be it known that I, Annxrs Ln BLANO, a citizen of the United States, residingin the city of New York, inc/the county of'New York and State of New York, have invented certain new and useful Improvements in Interrupters for Electromagnetic Reciprocating Devices, of which the following is a full, clear, and exact description, such as will enable others skilled in'the art to which it pertains to make, construct, and use the same.

My invention relates particularly to magnetic interrupters or circuit breakers for use in connection with electromagnetic reciprocating devices, such as for instance, electromagnetic motors, riveting hammers, drills, and large gongs, in which solenoids are employed, provided with a core or plunger which is caused to automatically vibrate or is operated by the plunger.

The object of my invention is to provide an improved magnetic'interrupter or circuit breaker which will permit the current to be active for the maximum length of time for a given stroke of the movement of the plunger in order that the energizing current may have reached its highest point of etliciency reciprocating core or when the circuit is interrupted, and the blow, delivered, thus providing effective means'g causing extremely rapid interruption of the 1 circuit to take place, and the same comprises a solenoid coil, a reciprocating core or plunger projecting into and movable under the and a magnetic interrupter adapted to energize the coil and interrupt the current when the energizing current has reached its highest point of efliciency, said interrupter comprising a reciprocating magnetic contact and pivotally arranged, spring-pressed magnetic contacts.

have shown my improved interrupter in connection with a riveting hammer, but it will be understood that it can be used in connection with numerous other appliances, wherein a powerful, vice is required.

In the accompanying drawings forming a part of this specification, Figure 1 represents a sectional elevation of an electric rivetin hammer embodying my invention, the han le of said hammer not being shown. 2 represents an end View of the same.

f Fig. 3 represents an enlarged side view of of the core,

(1 which are secured rapid reciprocating (lo-- .sulating disk 6 the interrupter. Fig. 4: represents an end view of the same;

Similar letters of parts throughout the specification and drawings.

In the drawings, I have shown an electro-:

I and Fig. 5 represents a diagram of the wiring. reference refer to like magnetic reciprocating riveting hammer, in

which a single solenoid and a single core is employed, in connection with my improved interrupter for making and breaking the electric circuit, whereby said core is caused to reciprocate rapidly. The device can and has been successfully employed in structures.

plate arranged on the end of the core to an-' other contact arm, and then about the solenoid, thereby drawing the core to its forward position in the solenoid, the pull of the core being against a retracting spring.

The spring, together with the momentum causes the core to return to its rearward position, and the magnetism set up in the coil, after lished by the core contacting with both of the contact arms, tends to cushion the plunger and its rearward stroke is arrested, and the magnetism in the coil draws the plunger forward to complete its forward stroke.

The solenoid may be constructed in any suitable manner,- but as here shown, the coil a is woundon a suitable spodl 6 made of insulating material. The spool b is mounted upon the brass tubular bushing c which is fitted into the circular soft steelend plates within a tubular soft steel casing e provided with a tapered end.

current has been estab- Slidingly mounted in the brass tubular bushing c is the core or plunger I) preferably made of soft steel and provided at its rear end with a contact plate 6 made of hardenedsteel or other magnetic material properly insulated from the core by the inwhich is secured thereto in any convenient manner. Owing to the action of the spiral compression spring 9,- the core I) has a tendency to rotate, and for that reason, I prefer to construct 'the contact plate e inthe nature ofa diskas shown,

- tate with the core thereby insuring perfectwhich construction enables the contact to ro- Y which may be secured a tool, not shown.

The core I) at its forward end is provided with a reduced and hardened portion r g adapted to deliver the blow to the tool to be used. .The core I) "is retracted by the spiral spring g, which is conveniently in-' terposed between the end of-the core and er sideof the tapered end of the cas an inspection of Fig. 3, in which contact the ing e.

11, is a block of insulating material, secured to the end plate din anyiconvenient manner, as by screws it. .Mounted upon this block of insulating material h are the terminals i and i and the steel brackets y and y" respectively, to which are pivotally secured the spring-pressed contact arms (1 and f made of hardened steel or other magnetic material. The bracket j is provided with a stop It at its forward-end to limit -the forward movement of the contact arm 7 d. The contact arm (2 is provided near its upper end with a notch d in which is'secured one end of the spring Z, the other end of which is preferably clamped between the steel bracket 7' and terminal 71. Spring Z is secured in substantially the same manner to the insulating block it, the free end of the spring Z"not being fastened to the contact arm f, but merely pressing against the same, in order that the contact arm f is constantly kept in contact with tlie contact plate 6 of the core I).

In the ,practlcal operation of the hammer, when the parts are in the position illustrated in full lines in Fig. 3, it is to v be observed that the current flows from the feed wire on to the-terminal i, then to the contact armsd, then through the contact plate e on the core and then from the latter 1 to the contact arm 7 through the terminal 3, namely, contact arms (1 and in line with each other and both contacting, with the contact plate 6,) it carries with it both arms d and 7 due to the magnetic attraction be=-.

tween the arms d and f and the magnetic contact plate-e, until arm 01 strikes the stop is on the-bracket j and is released from the contact plate e, when the contact is broken and no current is supplied and contact arm d instantly snaps back to its neutral posicore 3) causes the core to reach its rearward position, and while returning, the contact plate e contacts with the contact arm d, and the magnetism set up in the coil after current has been established again by contact plate 8 contacting with contact arm 03,

tends to cushion the core and its rearward -movement is arrested, and the circuit being againtlosed, the magnetism' in the coil draws the plunger forward to complete its forward stroke. It will thus be seen from arm (1 is shown in dotted lines with contact arm f in the same position, that the which said arm 65 is shown in full lines,

while contact arm f still contacts with the contact plate 6 due to the spring Z which keeps it in contact with the contact plate e, until the core has completed its forward before reaching the full return stroke, the contact plate 6 on the end of the core strikes stroke, when it returns with the core, and f the contact arm (Z, which is in the position shown in full lines in Figs. 1 and 3, and carries it together with contact arm f back as illustrated in dotted lines in Fig. 3, there by closing the circuit and thus the reciprocating motion of the core will continue so long as the 'key 0 remains closed. A condenser n or other device may be inserted across the wires mand n to eliminate the spark when the circuit is brokenby contact arm 0! as the core reciprocates.

It will be seen that from the moment the contact plate e .contacts with the contactv arm (1 on the backward "movement of the core b, the'current commences to rise in the coil a and continues so to do until arm 05' moves to the rearward dotted position in Fig. -3, and the current still continues to rise until the contact arm 03 is released by be seen that current is rising in the coil for more than two-thirds ofthe cycle of operation of the core or plunger, thereb coming a large percentage of the sol -induction of the coil (1', and enabling the magnetic' circuit to rise to a higher degree of v magnetic efliciency in the limited time that the core or plunger is performingits cycle of operation. j 1 a I Experience has demonstrated that the organization above described is a practical and efficient one for accomplishing the ends sought by this invention. The construction may, however, be varied in detail ,by

over-'- the stop k onsthe bracket 7'. Thus it will I gizing circuit therefor,

those skilled in such matters, without de-' parture from the invention.

I claim:

1. An interrupter for electromagnetic reciprocating devices, comprising a solenoid terrupter comprising a magnetic reciprocating contact movable with the core but insulated therefrom and a pair of spring-' pressed magnetic contacts and means engaging with one of said spring-pressed contacts for breaking the circuit. K

2. A device of the character described, comprising a rotary and reciproeatory contact of magnetic material secured to a reciprocating and rotary core, a solenoid coil adapted to influence the core to effect the movement thereof in one direction,- means for moving the core in the opposite direction, supporting. brackets mounted independently of the core, spring-pressed contact arms of magnetic material pivotally mounted in said brackets, one of said arms contacting with and reciprocating with the core in the direction of reciprocation thereof, the other contact arm contacting with the core but having a limited movement ,in the direction of the forward reciprocation of the core and arranged to impact against its supporting bracket to interrupt the current.

3. In an apparatus of the class described, in combination, an electromagnet, a reciprocatory element magnetically actuated thereby, an energizing circuit for the electromagnet, and a circuit making and breaking device, including a contact magnetically actuated by the reciprocatory element whereby to follow the same in one direction,

.a stop to arrest the contact at a predetermined point in its path, and means for moving the contact in the opposite direction after such arrest.

4. In an apparatus of the class described, in combination, an electromagnet, an energizing circuit therefor, a reciprocatory plunger magnetically actuated by the electromagnet, a magnetic contact plate movable .with the plunger but electrically insulated therefrom and connected in said circuit, a contact adapted to bear on said plate and to be moved magnetically thereby, said contact being also connect/ed with said circuit whereby separation of the contact and the plate will break the circuit, means for arresting the contact at a predetermined point in its path of movement, and means for contact in the opposite direction after such arrest.

5. In an apparatus of the class described, in combination, an electromagnet, an enera reciprocatory plunger magnetically actuated by the electrowith the plunger but moving the sulated contact magnet, a magnetic contact plate movable with the plunger but electrically insulated v therefrom and connected in said circuit, a contact-finger adapted to bear on said plate and to be moved magnetically thereby in the forward direction, said finger being 'connected with said circuit whereby separation of the finger and plate will break the circuit, a stop to arrest the finger at a predetermined point in its forward movement, and means to move thefinger rearwardly after such arrest.

6. In an apparatus of the class described, in combination, an electromagnet, an energizing circuit therefor, a reciprocatory-plum ger magnetically actuated by the electromagnet, a magnetic contact plate movable electrically insulated therefrom, a movable finger bearing on said plate, a spring'operating to press the finger on the plate and cause the same to follow the plate, said finger being connected in said energizing circuit, a contact bearing on said plate and magnetically actuated thereby, said contact being connected with the circuit whereby separation of the contact and the plate will break the circuit, a stop to arrest the contact at a predetermined point in its path, and means to move the contact in the opposite direction after such arrest.

In an apparatus of the class described, in combination, an electromagnet, an energizing circuit therefor, a reciprocatory plunger magnetically actuated by the electromagnet, a magnetic contact plate movable with the plunger, and electrically insulated therefrom, a spring-pressed finger bearing on the plate and connected in said circuit whereby to carry current to the plate, a finger adapted to bear on the plate and magnetically actuated thereby so as to follow the plate, said last named finger being connected with the circuit whereby separation of the finger and plate will break the circuit, a stop to arrest the magnetically actuated finger at a predetermined point in its path of movement in one direction, and means for moving the magnetically actuated finger in the opposite direction after such arrest.

8. In an apparatus of the class described, in combination, an electromagnet, an enrgizing circuit therefor, a reciprocatory plunger magnetically actuated by the electromagnet, a contact plate movable with the plunger but electrically insulated therefrom, said plate being connected in said circuit, and means cooperating with the inplate'to make and break the circuit thereat.

9. In an apparatus of the class described, a solenoid, a plunger movable thereby, an energizing circuit for said solenoid, a plurality of contact devices, said devices being magnetically actuated and one of said de- 4L Y i v I 1,124,47e

vices having a resilient means adapted to ger, whereby the energizing circuit is broken 10 supplement the magnetic action and mainand the solenoid deenergized; I

tain the contact in engagement with the This specification signed and witnessed plullllger, the othea of said devices hailvin' g a this 24th day of September, 1910. v

resi 'ent means a apte to retract t e con- Y Y tact from the plunger when the solenoid is y ALEXIS LE I denergized, and a stop member adapted to Witnesses: break the magnetically induced contact of "R, HUNDnRsoN, said last mentioned device with the plun- FREDK. O. FISCHER. 

